$.app({
	data: {
		choices:[],//[{title:"",key:""},...]
		active:0//当前选中项
	},
	
	onLoad:function () {
		var me = this;
		
	},
	onClick:function(e){
		var me = this;
		var key = $.toInt(e.data.key);
		me.setData({
			active: key
		})
	}
	
});